When I tried to upload a wall it said me 'wallpaper exists', maybe it is, but the existing wallpaper definitely doesn't have a required tag (Noah Bradley), so please add a possibility to view existing wallpaper when fails to upload, to make sure it really exists, has correct tags and resolution, even if it's all match, maybe it's not bad to upload a different size and group them?
Also some offtop here. I was thinking about minimum tags on upload. First thought I have is to add some function, that just counts tags amount, and if tags<2 then 'finalize uploads' button inactive. What am I missing? It can't be so simple, otherwise you'd realize this feature long ago.
Another offtop. Are you planning to just improve auto dupe detection or there will be some tools for users to manage duplicated wallpapers effectively? For example, when someone sees two or more duplicated wallpapers, he(she) press a button 'dupe' or something, then choose all duplicated, and then the server automatically compares these(maybe resize them all to smallest given resolution for better comparison) and if they match, removes all except biggest res, or group them?